What Is Azure Active Directory? (Microsoft Entra ID Explained)

What Is Azure Active Directory? (Now Microsoft Entra ID)

Azure Active Directory (Azure AD) is Microsoft's cloud-based identity and access management service. It controls who can sign in to your organization's apps, devices, and data — and what they are allowed to do once they are in. In July 2023, Microsoft renamed Azure Active Directory to Microsoft Entra ID, though the product itself remained the same. You will see both names used across Microsoft's documentation and in the IT industry.

Think of it as the gatekeeper for your digital workplace. When an employee signs into Microsoft 365, opens SharePoint, joins a Teams meeting, or accesses a cloud app like Salesforce or Dropbox Business, Entra ID is the system running in the background verifying their identity and deciding what they are permitted to access.

If your business uses Microsoft 365, you already have Entra ID. It is included with every Microsoft 365 subscription — most businesses just do not realize it is there or how much they could be doing with it.

Azure Active Directory vs. Traditional Active Directory: What Is the Difference?

The naming similarity causes a lot of confusion. Active Directory (AD) and Azure Active Directory (Entra ID) are two different products that solve different problems.

Traditional Active Directory (On-Premises)

Active Directory was introduced with Windows Server 2000. It is a directory service that runs on servers you own and manage on-site. It handles authentication and authorization within a closed corporate network — logging users into Windows workstations, connecting printers, managing file shares, applying Group Policy settings, and controlling access to on-premises servers.

Traditional AD is built around the Kerberos and LDAP protocols. It requires physical (or virtual) domain controllers that you must patch, back up, and maintain. It works extremely well in environments where all your users and resources are in the same building or connected via a dedicated network.

Microsoft Entra ID / Azure Active Directory (Cloud)

Entra ID is designed for a different world — one where users work remotely, use personal and company devices, and access cloud apps from anywhere. Instead of Kerberos and LDAP, it uses modern protocols like OAuth 2.0, OpenID Connect, and SAML — the standards that power secure login across the internet.

Entra ID does not require any servers on your end. Microsoft hosts and maintains the entire infrastructure, including redundancy and security monitoring. You manage policies and users through a web portal or Microsoft APIs — no domain controllers to patch, no replication to monitor.

The Key Practical Difference

A useful rule of thumb: if you are managing users who log into a Windows PC joined to your office network, that is traditional Active Directory territory. If you are managing users who sign into Microsoft 365, cloud apps, or remote resources from any device or location, that is Entra ID territory. Most organizations today need both — and Microsoft provides tools to connect them seamlessly.

Already managing Microsoft 365 for your team? Our guide on securing Global Admin access in Microsoft 365 covers the Entra ID roles and Conditional Access policies every business should have in place.

What Does Microsoft Entra ID Actually Do?

For most small and mid-sized businesses, Entra ID does six things that matter.

Single Sign-On (SSO)

SSO lets users sign in once and access all their apps — Microsoft 365, SharePoint, Teams, and thousands of third-party applications like Slack, Zoom, Salesforce, and Adobe — without re-entering their credentials for each one. This removes friction for employees and reduces the number of passwords in circulation, which directly reduces security risk. Entra ID supports SSO for over 3,500 pre-integrated SaaS applications in the Microsoft app gallery.

Multi-Factor Authentication (MFA)

Entra ID manages MFA for your organization. When a user signs in, they must verify their identity through a second method — the Microsoft Authenticator app, a text message code, a phone call, or a FIDO2 hardware key. MFA blocks the overwhelming majority of account compromise attempts, including phishing attacks where a user's password has been stolen. According to Microsoft's security research, MFA prevents over 99.9% of automated account attacks.

Conditional Access

Conditional Access policies let you define the conditions under which a sign-in is allowed. You can require MFA only when a user signs in from an unfamiliar location, block access from countries where your business does not operate, restrict access to managed devices only, or require a compliant device posture before allowing entry to sensitive data. These policies run every time someone attempts to sign in — automatically enforcing your security rules without requiring manual intervention.

User and Group Management

Entra ID is the central place where you create, manage, and deactivate user accounts. When an employee joins, you create their account in Entra ID and assign them to groups — which controls exactly which apps and resources they can access. When they leave, you disable their account in one place, immediately cutting off access to every connected application. No more hunting through individual apps to remove a former employee.

Device Identity

Entra ID tracks which devices are allowed to access your organization's resources. Devices can be Entra ID Joined (fully managed corporate devices) or Entra ID Registered (personal BYOD devices with lighter management). Combined with Microsoft Intune, this gives you visibility into the compliance state of every device accessing your data — and the ability to enforce policies or remotely wipe a lost or stolen device.

Self-Service Password Reset

SSPR allows users to reset their own passwords without calling IT. They verify their identity through a registered phone number or email, then set a new password. For businesses running a helpdesk, this is a measurable time saver — password resets are one of the highest-volume support ticket categories. Entra ID's SSPR also syncs the new password back to on-premises Active Directory when hybrid sync is configured.

How Entra ID Fits Into Your Microsoft 365 Environment

Every Microsoft 365 subscription includes a version of Microsoft Entra ID. The free tier — which is what comes with most Microsoft 365 plans — already includes SSO for up to 10 apps, basic MFA, Entra Connect sync, and user and group management.

Organizations with more complex security needs can upgrade to Entra ID Premium P1 or P2, which are included in Microsoft 365 Business Premium, E3, and E5 plans:

• Premium P1 ($6/user/month standalone): Adds Conditional Access, dynamic groups, hybrid identity features, self-service group management, and Identity Protection reporting.
• Premium P2 ($9/user/month standalone): Adds Privileged Identity Management (PIM) for just-in-time admin access, Identity Protection with risk-based Conditional Access, and access reviews.

For most SMBs, Microsoft 365 Business Premium is the right starting point — it includes Entra ID P1 alongside Intune device management, Defender for Business, and all the Microsoft 365 productivity apps in a single, reasonably priced bundle.

If your business uses Windows Autopilot for device provisioning, Entra ID is central to the entire process. Our Windows Autopilot setup guide explains how devices automatically join Entra ID and enroll in Intune the moment they connect to the internet.

Hybrid Identity: Connecting On-Premises AD with Entra ID

Many organizations have traditional Active Directory running on-premises alongside Microsoft 365 in the cloud. Microsoft Entra Connect (formerly Azure AD Connect) is the tool that bridges these two environments. It synchronizes user accounts and passwords from your on-premises Active Directory to Entra ID, giving users a single set of credentials that works for both their Windows workstation login and their Microsoft 365 apps.

This hybrid model is extremely common among businesses that have been operating for a decade or more — they have an existing on-premises infrastructure they are not ready to fully abandon, but they are also using cloud services extensively. Entra Connect runs as a service on a Windows server in your environment, syncing changes to the cloud typically every 30 minutes.

The key advantage: users do not need to remember separate passwords for on-premises and cloud resources. When they change their on-premises password, it syncs to Entra ID automatically. When they are offboarded, disabling their AD account disables their cloud access as well.

What Microsoft Entra ID Means for Your Business Security

Identity is the most common attack vector in modern cybercrime. Compromised credentials are the entry point for the majority of ransomware attacks, business email compromise scams, and data breaches. Entra ID, configured correctly, is one of the strongest defenses available to a small or mid-sized business.

Specifically, the combination of MFA + Conditional Access + Identity Protection creates a layered security posture where:

• Stolen passwords alone are not enough to gain access
• Unusual sign-in patterns trigger additional verification or block access entirely
• High-risk sign-ins are flagged automatically for review
• Privileged accounts require just-in-time approval before elevated access is granted

For businesses that need to meet cyber insurance requirements or compliance frameworks, having Entra ID properly configured — with MFA enforced, Conditional Access in place, and privileged access managed — addresses a large portion of the controls auditors look for. Setting up MFA via the Microsoft Authenticator app is the first step; if your team needs help with that setup, our Microsoft Authenticator setup guide walks through the process.

Frequently Asked Questions

Is Azure Active Directory the same as Microsoft Entra ID?

Yes. Microsoft renamed Azure Active Directory to Microsoft Entra ID in July 2023. The underlying product and its features did not change with the rebrand — only the name. In day-to-day IT conversations and in Microsoft's own documentation, you will encounter both names. If you see references to "Azure AD," "AAD," or "Microsoft Entra ID," they all refer to the same identity and access management service.

Do I need Azure Active Directory if I use Microsoft 365?

If you use Microsoft 365, you already have Entra ID — it is built into every Microsoft 365 subscription and handles authentication for every app in the suite. The real question is whether you are using it to its full potential. Most organizations use only a fraction of the security and governance features available, leaving significant protection on the table.

What is the difference between Azure AD and Azure AD Domain Services?

Azure AD (Entra ID) is a cloud identity service for managing users and controlling access to cloud applications. It uses modern protocols like OAuth and SAML. Azure AD Domain Services (Entra Domain Services) is a separate service that provides a managed Active Directory domain in the cloud — including LDAP, Kerberos, Group Policy, and domain join functionality — without requiring you to run domain controllers yourself. Domain Services is mainly used to run legacy applications in Azure that need traditional AD features but where you do not want to manage the underlying servers.

Can small businesses use Microsoft Entra ID?

Absolutely. The free tier included with Microsoft 365 is sufficient for basic identity management and MFA for very small teams. Microsoft 365 Business Premium, which starts at around $26 per user per month and includes Entra ID P1, is the most cost-effective option for SMBs that need Conditional Access, Intune, and Defender for Business in a single license. For most businesses under 300 users, this covers everything they need.

Your Business Already Has This — Are You Using It?

Microsoft Entra ID is not an add-on or an enterprise-only product. It is already running in your Microsoft 365 environment, right now. The question is whether it is configured to protect your business or just sitting at its defaults.

Getting the most out of Entra ID — MFA enforced for every user, Conditional Access policies tuned to your business, hybrid sync configured correctly, and privileged access locked down — is exactly the kind of foundational work that makes the difference between a secure environment and a breach waiting to happen.

At Always Beyond, configuring and managing Microsoft Entra ID is part of how we build secure, well-run Microsoft 365 environments for our clients. If you are not sure what your current Entra ID setup looks like or whether you are getting the security you are paying for, reach out to Always Beyond for a Microsoft 365 environment review.